.\"	$OpenBSD: d2i_PKCS7.3,v 1.3 2016/12/27 08:20:27 jmc Exp $
.\"
.\" Copyright (c) 2016 Ingo Schwarze <schwarze@openbsd.org>
.\"
.\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
.Dd $Mdocdate: December 27 2016 $
.Dt D2I_PKCS7 3
.Os
.Sh NAME
.Nm d2i_PKCS7 ,
.Nm i2d_PKCS7 ,
.Nm d2i_PKCS7_bio ,
.Nm i2d_PKCS7_bio ,
.Nm d2i_PKCS7_fp ,
.Nm i2d_PKCS7_fp ,
.Nm i2d_PKCS7_NDEF ,
.Nm d2i_PKCS7_DIGEST ,
.Nm i2d_PKCS7_DIGEST ,
.Nm d2i_PKCS7_ENCRYPT ,
.Nm i2d_PKCS7_ENCRYPT ,
.Nm d2i_PKCS7_ENC_CONTENT ,
.Nm i2d_PKCS7_ENC_CONTENT ,
.Nm d2i_PKCS7_ENVELOPE ,
.Nm i2d_PKCS7_ENVELOPE ,
.Nm d2i_PKCS7_ISSUER_AND_SERIAL ,
.Nm i2d_PKCS7_ISSUER_AND_SERIAL ,
.Nm d2i_PKCS7_RECIP_INFO ,
.Nm i2d_PKCS7_RECIP_INFO ,
.Nm d2i_PKCS7_SIGNED ,
.Nm i2d_PKCS7_SIGNED ,
.Nm d2i_PKCS7_SIGNER_INFO ,
.Nm i2d_PKCS7_SIGNER_INFO ,
.Nm d2i_PKCS7_SIGN_ENVELOPE ,
.Nm i2d_PKCS7_SIGN_ENVELOPE
.Nd decode and encode PKCS#7 data structures
.Sh SYNOPSIS
.In openssl/pkcs7.h
.Ft PKCS7 *
.Fo d2i_PKCS7
.Fa "PKCS7 **val_out"
.Fa "const unsigned char **der_in"
.Fa "long length"
.Fc
.Ft int
.Fo i2d_PKCS7
.Fa "PKCS7 *val_in"
.Fa "unsigned char **der_out"
.Fc
.Ft PKCS7 *
.Fo d2i_PKCS7_bio
.Fa "BIO *in_bio"
.Fa "PKCS7 **val_out"
.Fc
.Ft int
.Fo i2d_PKCS7_bio
.Fa "BIO *out_bio"
.Fa "PKCS7 *val_in"
.Fc
.Ft PKCS7 *
.Fo d2i_PKCS7_fp
.Fa "FILE *in_fp"
.Fa "PKCS7 **val_out"
.Fc
.Ft int
.Fo i2d_PKCS7_fp
.Fa "FILE *out_fp"
.Fa "PKCS7 *val_in"
.Fc
.Ft int
.Fo i2d_PKCS7_NDEF
.Fa "PKCS7 *val_in"
.Fa "unsigned char **ber_out"
.Fc
.Ft PKCS7_DIGEST *
.Fo d2i_PKCS7_DIGEST
.Fa "PKCS7_DIGEST **val_out"
.Fa "const unsigned char **der_in"
.Fa "long length"
.Fc
.Ft int
.Fo i2d_PKCS7_DIGEST
.Fa "PKCS7_DIGEST *val_in"
.Fa "unsigned char **der_out"
.Fc
.Ft PKCS7_ENCRYPT *
.Fo d2i_PKCS7_ENCRYPT
.Fa "PKCS7_ENCRYPT **val_out"
.Fa "const unsigned char **der_in"
.Fa "long length"
.Fc
.Ft int
.Fo i2d_PKCS7_ENCRYPT
.Fa "PKCS7_ENCRYPT *val_in"
.Fa "unsigned char **der_out"
.Fc
.Ft PKCS7_ENC_CONTENT *
.Fo d2i_PKCS7_ENC_CONTENT
.Fa "PKCS7_ENC_CONTENT **val_out"
.Fa "const unsigned char **der_in"
.Fa "long length"
.Fc
.Ft int
.Fo i2d_PKCS7_ENC_CONTENT
.Fa "PKCS7_ENC_CONTENT *val_in"
.Fa "unsigned char **der_out"
.Fc
.Ft PKCS7_ENVELOPE *
.Fo d2i_PKCS7_ENVELOPE
.Fa "PKCS7_ENVELOPE **val_out"
.Fa "const unsigned char **der_in"
.Fa "long length"
.Fc
.Ft int
.Fo i2d_PKCS7_ENVELOPE
.Fa "PKCS7_ENVELOPE *val_in"
.Fa "unsigned char **der_out"
.Fc
.Ft PKCS7_ISSUER_AND_SERIAL *
.Fo d2i_PKCS7_ISSUER_AND_SERIAL
.Fa "PKCS7_ISSUER_AND_SERIAL **val_out"
.Fa "const unsigned char **der_in"
.Fa "long length"
.Fc
.Ft int
.Fo i2d_PKCS7_ISSUER_AND_SERIAL
.Fa "PKCS7_ISSUER_AND_SERIAL *val_in"
.Fa "unsigned char **der_out"
.Fc
.Ft PKCS7_RECIP_INFO *
.Fo d2i_PKCS7_RECIP_INFO
.Fa "PKCS7_RECIP_INFO **val_out"
.Fa "const unsigned char **der_in"
.Fa "long length"
.Fc
.Ft int
.Fo i2d_PKCS7_RECIP_INFO
.Fa "PKCS7_RECIP_INFO *val_in"
.Fa "unsigned char **der_out"
.Fc
.Ft PKCS7_SIGNED *
.Fo d2i_PKCS7_SIGNED
.Fa "PKCS7_SIGNED **val_out"
.Fa "const unsigned char **der_in"
.Fa "long length"
.Fc
.Ft int
.Fo i2d_PKCS7_SIGNED
.Fa "PKCS7_SIGNED *val_in"
.Fa "unsigned char **der_out"
.Fc
.Ft PKCS7_SIGNER_INFO *
.Fo d2i_PKCS7_SIGNER_INFO
.Fa "PKCS7_SIGNER_INFO **val_out"
.Fa "const unsigned char **der_in"
.Fa "long length"
.Fc
.Ft int
.Fo i2d_PKCS7_SIGNER_INFO
.Fa "PKCS7_SIGNER_INFO *val_in"
.Fa "unsigned char **der_out"
.Fc
.Ft PKCS7_SIGN_ENVELOPE *
.Fo d2i_PKCS7_SIGN_ENVELOPE
.Fa "PKCS7_SIGN_ENVELOPE **val_out"
.Fa "const unsigned char **der_in"
.Fa "long length"
.Fc
.Ft int
.Fo i2d_PKCS7_SIGN_ENVELOPE
.Fa "PKCS7_SIGN_ENVELOPE *val_in"
.Fa "unsigned char **der_out"
.Fc
.Sh DESCRIPTION
These functions decode and encode PKCS#7 data structures.
For details about the semantics, examples, caveats, and bugs, see
.Xr ASN1_item_d2i 3 .
.Pp
.Fn d2i_PKCS7
and
.Fn i2d_PKCS7
decode and encode an ASN.1
.Vt ContentInfo
structure defined in RFC 2315 section 7.
.Fn d2i_PKCS7_bio ,
.Fn i2d_PKCS7_bio ,
.Fn d2i_PKCS7_fp ,
and
.Fn i2d_PKCS7_fp
are similar except that they decode or encode using a
.Vt BIO
or
.Vt FILE
pointer.
.Pp
.Fn i2d_PKCS7_NDEF
is similar to
.Fn i2d_PKCS7
except that it encodes using BER rather than DER, using the indefinite
length form where appropriate.
.Pp
.Fn d2i_PKCS7_DIGEST
and
.Fn i2d_PKCS7_DIGEST
decode and encode an ASN.1
.Vt DigestedData
structure defined in RFC 2315 section 12.
.Pp
.Fn d2i_PKCS7_ENCRYPT
and
.Fn i2d_PKCS7_ENCRYPT
decode and encode an ASN.1
.Vt EncryptedData
structure defined in RFC 2315 section 13.
.Pp
.Fn d2i_PKCS7_ENC_CONTENT
and
.Fn i2d_PKCS7_ENC_CONTENT
decode and encode an ASN.1
.Vt EncryptedContentInfo
structure defined in RFC 2315 section 10.1.
.Pp
.Fn d2i_PKCS7_ENVELOPE
and
.Fn i2d_PKCS7_ENVELOPE
decode and encode an ASN.1
.Vt EnvelopedData
structure defined in RFC 2315 section 10.
.Pp
.Fn d2i_PKCS7_ISSUER_AND_SERIAL
and
.Fn i2d_PKCS7_ISSUER_AND_SERIAL
decode and encode an ASN.1
.Vt IssuerAndSerialNumber
structure defined in RFC 2315 section 6.7.
.Pp
.Fn d2i_PKCS7_RECIP_INFO
and
.Fn i2d_PKCS7_RECIP_INFO
decode and encode an ASN.1
.Vt RecipientInfo
structure defined in RFC 2315 section 10.2.
.Pp
.Fn d2i_PKCS7_SIGNED
and
.Fn i2d_PKCS7_SIGNED
decode and encode an ASN.1
.Vt SignedData
structure defined in RFC 2315 section 9.
.Pp
.Fn d2i_PKCS7_SIGNER_INFO
and
.Fn i2d_PKCS7_SIGNER_INFO
decode and encode an ASN.1
.Vt SignerInfo
structure defined in RFC 2315 section 9.2.
.Pp
.Fn d2i_PKCS7_SIGN_ENVELOPE
and
.Fn i2d_PKCS7_SIGN_ENVELOPE
decode and encode an ASN.1
.Vt SignedAndEnvelopedData
structure defined in RFC 2315 section 11.
.Sh RETURN VALUES
.Fn d2i_PKCS7 ,
.Fn d2i_PKCS7_bio ,
and
.Fn d2i_PKCS7_fp
return a
.Vt PKCS7
object or
.Dv NULL
if an error occurs.
.Pp
.Fn d2i_PKCS7_DIGEST ,
.Fn d2i_PKCS7_ENCRYPT ,
.Fn d2i_PKCS7_ENC_CONTENT ,
.Fn d2i_PKCS7_ENVELOPE ,
.Fn d2i_PKCS7_ISSUER_AND_SERIAL ,
.Fn d2i_PKCS7_RECIP_INFO ,
.Fn d2i_PKCS7_SIGNED ,
.Fn d2i_PKCS7_SIGNER_INFO ,
and
.Fn d2i_PKCS7_SIGN_ENVELOPE
return an object of the respective type or
.Dv NULL
if an error occurs.
.Pp
.Fn i2d_PKCS7 ,
.Fn i2d_PKCS7_NDEF ,
.Fn i2d_PKCS7_DIGEST ,
.Fn i2d_PKCS7_ENCRYPT ,
.Fn i2d_PKCS7_ENC_CONTENT ,
.Fn i2d_PKCS7_ENVELOPE ,
.Fn i2d_PKCS7_ISSUER_AND_SERIAL ,
.Fn i2d_PKCS7_RECIP_INFO ,
.Fn i2d_PKCS7_SIGNED ,
.Fn i2d_PKCS7_SIGNER_INFO ,
and
.Fn i2d_PKCS7_SIGN_ENVELOPE
return the number of bytes successfully encoded or a negative value
if an error occurs.
.Pp
.Fn i2d_PKCS7_bio
and
.Fn i2d_PKCS7_fp
return 1 for success or 0 if an error occurs.
.Sh SEE ALSO
.Xr ASN1_item_d2i 3 ,
.Xr i2d_PKCS7_bio_stream 3 ,
.Xr PEM_write_bio_PKCS7_stream 3 ,
.Xr PEM_write_PKCS7 3 ,
.Xr PKCS7_new 3 ,
.Xr SMIME_write_PKCS7 3
.Sh STANDARDS
RFC 2315: PKCS #7: Cryptographic Message Syntax Version 1.5
